Absolutely a timely warning!
I have been living in Australia since 1995 and experienced the entire sequence of "Tragedy" (Port Arthur murders) "Outrage" (The media circus following the Port Arthur murders) and Political Solution" (the extremely rapid government application of new firearms restrictions which most believe were prepared and waiting for a suitable tragedy).
Some of the figures in the video are a bit misleading as Australia already had a very low firearms involved crime rate before the Port Arthur murders.
Incidents of firearms involved assault in Sydney, invariably connected with gangs and drugs, are now sufficiently common that NSW has recently attempted to further 'tighten' legislation applying to law-abiding gun owners.
Of course, NONE of the guns being used are registered and NONE of the criminal shooters are licensed!
There is almost a nation-wide hoplophobia in urban Australia, and that is where 80% of voters reside. Voting is compulsory in Australia, so they do vote.
There weren't enough gun owners to constitute a significant political force (certainly not absent any Constitutional defense-Australia has no codified Bill of Rights) and they were steamrollered by a very focused and well funded anti-gun effort on the part of government and media.
You've got political clout there to use against Obama and his anti-freedom handlers. Use it!